<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8" />
		<title>简单的计算器</title>
        <style>
        	.an
        	{
        		background-color: orange;
        		color: #000000;
        		width: 7em;
        		height: 7em;
        		text-align: center;
        		padding-top: 1.9%;
                border: 1px solid;
        		float: left;
        		margin: 0px;
        	}
        </style>
	</head>
	<body>
		<div style="width: 28.5em;background-color: #000000;">
            <div name="xianshi" style="height: 8em;width: 100%;color: #ffffff;font-size: 2em;text-align: right;">
            	
            </div>
            <div id="an1" class="an">
            	<h1>7</h1>
            </div>
            <div id="an1" class="an">
            	<h1>8</h1>
            </div>
            <div id="an1" class="an">
            	<h1>9</h1>
            </div>

            <div id="fu1" class="an">
                <h1>+</h1>
            </div>

            <div id="an1" class="an">
            	<h1>4</h1>
            </div>
            <div id="an1" class="an">
            	<h1>5</h1>
            </div>
            <div id="an1" class="an">
            	<h1>6</h1>
            </div>

            <div id="fu1" class="an">
                <h1>-</h1>
            </div>

            <div id="an1" class="an">
            	<h1>1</h1>
            </div>
            <div id="an1" class="an">
            	<h1>2</h1>
            </div>
            <div id="an1" class="an">
            	<h1>3</h1>
            </div>

            <div id="fu1" class="an">
                <h1>x</h1>
            </div>

            <div id="an1" class="an">
            	<h1>0</h1>
            </div>
            <div id="an1" class="an">
            	<h1> </h1>
            </div>
            <div id="an1" class="an">
            	<h1>=</h1>
            </div>
            
            
            <div id="fu1" class="an">
            	<h1>/</h1>
            </div>
        </div>
	</body>
</html>
